Jessica Alba took her children to see Taylor Swift in concert.

The 'Sin City' star surprised her daughters, Honor, seven, and Haven, four, with a special trip to see the 'Shake It Off' hitmaker at the Staples Centre in Los Angeles, and even managed to bag the group some backstage passes.

Sharing a picture of her kids with the 25-year-old singer, she wrote: ''My lil #squad w the most beautiful, talented and kindest @taylorswift #momlife #taylorswiftrules.''

Also at the concert was Kate Hudson and her two sons, Bingham, four and Ryder, 11.

Meanwhile, Taylor - who starred alongside Jessica in her 'Bad Blood' music video - previously admitted she thought the actress had a ''tough vibe''.

Of Jessica, she said: ''She's amazing and has that vibe of being tough.

''Best first day we could have possibly had on the shoot!''

After the treat she gave her children, Jessica is likely to be expecting more help around the house from the little ones after previously revealing one of their favourite chores was cooking.

She said: ''It always take three times longer when they help, but I try to have them participate in any kind of cooking.

''It's good for them to understand the process of making food, and where it comes from. They are also more inclined to eat it, if they participate in making it.''